Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Operating activities
Net income	$ 16,361	$ 17,956
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation, amortization and accretion	6,577	7,089
Amortization of debt related costs	639	639
Loss on extinguishment of debt	3,196	0
Provision for bad debt	57	166
Provision for excess and obsolete inventory	977	1,959
Stock-based compensation	6,078	4,012
Deferred taxes	2,387	4,539
Long-term income tax receivable	(1,604)	(1,528)
Long-term income tax payable and other long-term liabilities	2,036	1,517
Other	(10)	346
Increases (decreases) in cash from operating assets and liabilities:
Accounts receivable	(1,755)	(4,223)
Inventory	(365)	(6,714)
Other current assets	(118)	(581)
Accounts payable	2,881	(2,900)
Accrued expenses and other liabilities	(5,816)	(2,667)
Net cash provided by operating activities	31,521	19,610
Investing activities
Capital expenditures	(13,984)	(7,761)
Proceeds from sales of assets	0	1,000
Net cash used in investing activities	(13,984)	(6,761)
Financing activities
Proceeds from issuance of long-term debt	199,461	0
Payments on long-term debt and other borrowings	(270,247)	(1,431)
Proceeds from stock option exercises	(2,034)	0
Proceeds from stock option exercises	444	1,140
Proceeds from issuance of common stock	282	206
Payments for minimum statutory tax withholding related to net share settlement of equity awards	(2,064)	(2,432)
Net cash used in financing activities	(74,158)	(2,517)
Effect of foreign exchange rates on cash and cash equivalents	105	(158)
Net (decrease) increase in cash and cash equivalents	(56,516)	10,174
Cash and cash equivalents, beginning of period	113,401	76,290
Cash and cash equivalents, end of period	$ 56,885	$ 86,464